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Title	Heat Decarbonisation: A Solution For The Future Smart Compact Cities In Japan
ID_Doc	28877
Authors	Tajima M.
Year	2025
Published	Smart Cities and Japan's Energy Transition: Past, Present, and Future
DOI	http://dx.doi.org/10.4324/9781003471448-8
Abstract	Japan has been suffering from a dwindling and ageing population for decades. To tackle this significant socio-economic challenge, the national government encourages the local government to transform cities into smart and compact cities to alleviate the social costs. In Japan, over half of the domestic energy is consumed as heat. Japan is heavily dependent on imported fossil fuels for the heat source. Japan needs to change it to greener and more sustainable renewable energy sources. Moreover, building a district heating network in the cities further enhances sustainability. We can see the best example in Denmark. Currently, 66% of Danish households are connected to district heating networks, with 60% of the heat generated from renewable energy sources. District heating networks act as "sinks" to integrate waste heat from waste incineration, data centres, factories, and alike, which is dumped otherwise. The networks also act as "batteries" to store excess renewable electricity to be converted to heat. According to the International Energy Agency, district heating networks provide significant potential for the efficient, cost-effective, and flexible large-scale integration of low-carbon energy sources into the heating energy mix. Compact and smart cities present an excellent opportunity to decarbonise the heat sector in cities. © 2025 selection and editorial matter, Maciej M. Sokolowski and Fumio Shimpo. All rights reserved.
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